X*Bert Mode
Press B, Y(3), B, Y(3), Start at the options screen. Start a new game to begin at the first bonus level.

View Credits & Backgrounds
Hold R + L at the options screen will appear. The credit screen will be displayed. Press Select to view different backgrounds.

Skip to Level 11
Press B(8) at the options screen and a sound will confirm correct code entry. Press Start and return to the title screen. Start a single player game to begin at Level 11.